20742603 has 16 divisors (see below), whose sum is σ = 31676160. Its totient is φ = 11827296.

The previous prime is 20742593. The next prime is 20742637. The reversal of 20742603 is 30624702.

It is not a de Polignac number, because 20742603 - 2⁴ = 20742587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20742643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13488 + ... + 14946.

It is an arithmetic number, because the mean of its divisors is an integer number (1979760).

Almost surely, 2^20742603 is an apocalyptic number.

20742603 is a deficient number, since it is larger than the sum of its proper divisors (10933557).

20742603 is a wasteful number, since it uses less digits than its factorization.

20742603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 20742603 is about 4554.4047909688. The cubic root of 20742603 is about 274.7605761834.

The spelling of 20742603 in words is "twenty million, seven hundred forty-two thousand, six hundred three".